"In an 2012 interview with iVillage, First Lady Michelle Obama said her husband had been motivated by their daughters to successfully quit for good.

"'I know that his ability to ultimately kick the habit was because of the girls, because they're at the age now where you can't hide,' Michelle Obama said. 'I think that he didn't want to look his girls in the eye and tell them that they shouldn't do something that he was still doing.'"